/* * Copyright (C) 2017 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF * THE POSSIBILITY OF SUCH DAMAGE. */ #import "config.h" #import "CPUTime.h" #import <mach/mach_init.h> #import <mach/task.h> #import <mach/task_info.h> #import <wtf/CurrentTime.h> namespace WebCore { static const int64_t microsecondsPerSecond = 1000000; static int64_t timeValueToMicroseconds(const time_value_t& value) { int64_t result = value.seconds; result *= microsecondsPerSecond; result += value.microseconds; return result; } std::optional<CPUTime> getCPUTime() { // Account for current threads. task_thread_times_info threadInfoData; mach_msg_type_number_t threadInfoCount = TASK_THREAD_TIMES_INFO_COUNT; kern_return_t result = task_info(mach_task_self(), TASK_THREAD_TIMES_INFO, reinterpret_cast<task_info_t>(&threadInfoData), &threadInfoCount); if (result != KERN_SUCCESS) return std::nullopt; int64_t userTime = timeValueToMicroseconds(threadInfoData.user_time); int64_t systemTime = timeValueToMicroseconds(threadInfoData.system_time); // Account for termined threads. task_basic_info taskInfoData; mach_msg_type_number_t taskInfoCount = TASK_BASIC_INFO_COUNT; result = task_info(mach_task_self(), TASK_BASIC_INFO, reinterpret_cast<task_info_t>(&taskInfoData), &taskInfoCount); if (result != KERN_SUCCESS) return std::nullopt; userTime += timeValueToMicroseconds(taskInfoData.user_time); systemTime += timeValueToMicroseconds(taskInfoData.system_time); return CPUTime { static_cast<int64_t>(monotonicallyIncreasingTime() * microsecondsPerSecond), userTime, systemTime }; } }